WorkflowManager TriggerEventAsync method, what are the recommendations?

[weirdyang]

When should I use IsExclusive = true and isAlwaysCorrelated = true?

                            await manager
                                .TriggerEventAsync(
                                name: MyEvent.EventName,
                                input: messageData,
                                correlationId: null,
                                isExclusive: true,
                                isAlwaysCorrelated: true);

what is the implication of this? does this mean if i have two workflow types with a starting activity related to this event, only one will be triggered if it is true?

I noticed the for the timer, isExclusive and isAlwaysCorrelated is set to true.

For the signal isExclusive is set to false, and isAlwaysCorrelated is also set to false, however, in the code they do manually resume workflows, vs the timer event which depends on the workflowmanager to do so:

OrchardCore/src/OrchardCore.Modules/OrchardCore.Workflows/Http/Controllers/HttpWorkflowController.cs

Line 253 in 5e90031

foreach (var signalActivity in signalActivities)

        /// <param name="isExclusive">
        /// If true, a new workflow instance is not created if an existing one is already halted on a starting activity related to this event. False by default.
        /// </param>

In my own testing, if isAlwaysCorrelated is set to false, a workflow halted on that event will not resume.